London Project Cost Calculator
Estimate your residential extension, loft conversion, full house refurbishment, or commercial fit-out across London. Our algorithmic pricing reflects current London materials, structural steel tariffs, and skilled labor rates.
Interactive London Build Cost Calculator
Reflects parking suspension tariffs, conservation area compliance, and site access constraints.
No obligation. Site audit conducted by Prime Builds Senior Surveyors in London.
Understanding London Construction Cost Breakdown
Unlike generic UK builders, London building work involves distinct factors such as party wall negotiations, London clay subsoil foundations, parking suspensions, and conservation controls.
Substructure & Steels (~30%)
Foundations, groundworks, RSJ steel craning, structural openings, and party wall beam pockets designed by certified engineers.
MEP & Envelope (~40%)
Crittall glazing, flat roof single-ply membranes, Part L acoustic insulation, zoned underfloor heating, and electrical circuitry.
Architectural Finishes (~30%)
Bespoke joinery, Calacatta marble waterfalls, airless spray painting, designer sanitaryware, and smart lighting controls.
Active London Borough Operations
Our specialized site managers possess deep familiarity with local council planning officers, party wall regulations, and conservation area guidelines.